773 Control Valve

[shepherd]

The main control valve on my 773 finally started puking after 10 years of ownership, I knew the valve was going to be very difficult (or impossible) to overhaul as it had lots of rust, so I bought a used valve and gave it a cleaning and seal kit while it was on the bench. All in all, not a bad job if you can stay organized and are good with small parts.. I'm glad that I did it, as I found some seals that were obviously worn, though overall it is in very nice shape.
IMG_8575 by sddesignbuild, on Flickr
https://www.flickr.com/photos/24397585@N02/33722846286/in/dateposted-public/
https://www.flickr.com/photos/24397585@N02/33634731141/in/dateposted-public/
Everything went fine, except for the relief valve. When I removed it, the large ring that seals it against the valve body was wound down into the threads, which seemed strange. And on inspection, theres a part that looks like it was crushed, either accidentally or perhaps peened down on purpose? I can't tell. I removed the valve from my bad unit, and it is crushed sort of the same way. Can anyone tell me what's going on here? I did put the new seals on it, and reinstall it, but I'd like some more info before I fill the system and fire it up
https://www.flickr.com/photos/24397585@N02/33607241682/in/dateposted-public/ https://www.flickr.com/photos/24397585@N02/33722846126/in/dateposted-public/
Thanks in advance. SD

 

[SkidRoe]

I added a title to your post for you and got your links working.
Cheers - SR

 

[shepherd]

I added a title to your post for you and got your links working.
Cheers - SR

Just for the record, to answer my own question, both the dealer service department, and Bud from Buddy's service in ND confirmed that the "dent" on the pressure relief valve is the way it comes from the factory. I've got it all back together and working well

 

[Tazza]

Just for the record, to answer my own question, both the dealer service department, and Bud from Buddy's service in ND confirmed that the "dent" on the pressure relief valve is the way it comes from the factory. I've got it all back together and working well

Glad it's working as it should.
The only thing i'd do is check the relief pressure setting, you have gone this far, it won't hurt to hook a gauge to your an aux hydraulic connector and see what you get. I don't know what your machine is meant to put out, but it should be in the high 2,000 psi range.